Maxumt Hydraulic Motor/Drive Package

SUPERIOR COMPONENTS=SUPERIOR PERFORMANCE

High torque/high speed technology has now arrived.  Shinn Systems proudly introduces the next level of grinder performance with the Maxum line of motor/drive components. 

What is "Maxum"?

Maxum refers to hydraulic motors running thorough heavy duty drive systems that, when coupled with Denison pumps,  produce over 2000 lbs. of torque force to the cutter tips for grinding. 

Why has this not been done before?

Manufacturers generally rely on standard components with standard controls.  Maximization of power obtained from an engine, through a hydraulic system, to a cutter head requires application specific products.  .  Additionally, this technology has just recently come to market as a result of years of testing by one of the largest hydraulic component manufacturers in the world.

What does this mean to you?

  • Faster recovery times

  • More torque to the cutter drum to help prevent slow down

  • Greater range of usable maximum power (up to 700 rpm)

  • More production

These units will out grind conventional powered units by up to 80%.

Maxum drive units can also be fitted to any SC-Lite 300, SC-2, or SC-2 Plus.

 Please email or call for comparative specifications for your unit!  

                                  SC-2 300 vs. SC MAXUM Upgrade

            

This graph depicts the hydraulic force applied to the cutter teeth (hydraulically not including inertia). The shaded green area is the optimal operating range determined by observation of highly productive operators (See Note A). On the left side of the graph is the amount, in pounds, of force applied to the teeth. Along the bottom of the graph is cutter drum RPM. All cutter drums will slow as load is placed upon them. The rate at which the drum slows, and conversely, the speed with which it recovers, is a function of force applied or torque.

Imagine, if you will, a cutter head beginning to grind a very large, hardwood tree. As the cutter drum encounters the wood, drag on the teeth will cause the drum to slow. The greater the feed rate, the greater the drag on the drum. As the cutter head speed decreases, the amount of pressure applied to the teeth increases to a maximum. Once this limit has been reached, it remains constant as the drum slows further. Once downward force is reduced, (i.e. the cutter head is lifted), it is this same force that is available to reaccelerate the cutter drum for the next "bite". The slower the rate of deceleration, and the faster that the drum recovers, the more productive the unit is.

Referring to the SC-2 300 line, this force increases to a maximum of 933 pounds at 1219 RPM. From this point on during deceleration, the force applied to the teeth remains constant at 933 pound. Once the cutter head is lifted, it is this same 933 pound force that determines how much time it will take for the cutter to recover in order to take the next "bite".

The SC-Maxum line shows the amount of force applied to the teeth increase at the same rate as the SC-2 300 until 1219 RPM, where the lines split. From this point onward in the deceleration, force continues to rise on the cutter teeth to a maximum of 2037 pounds at 547 RPM. At each point along the RPM line the difference in the two lines is equivalent to the additional amount of force for grinding and reaccelerating the drum.

 

                       

This chart depicts horsepower delivered to the cutter head at various cutter drum RPMs. The green shaded area is the optimal operating range as determined by observation of highly productive operators (See Note 1). On the left side of the graph is horsepower delivered to the cutter drum. Along the bottom is the cutter drum speed in RPM. All cutter drums will slow as increasing load is placed upon them. The rate at which the drum slows, and conversely, the speed at which it recovers is a function of horsepower applied to the drum.

Reffering to the SC-2 300 line, the amount of horsepower applied to the cutter drum remains constant at 270 HP until 1219 RPM. As the cutter drum continues to decelerate, the HP delivered to the drum begins to fall. This is a function of the pressure limit of the pump. "A" depicts the operating range of the cutter head RPM in which the engine will be producing it’s maximum power (i.e. on the governor). As can be see from the graph, during operation on a SC-2 300, the range of RPM that the engine is truly producing maximum power is just over 100 RPM. If at any time during grinding operations, the operator allows the speed of the cutter drum to go below 1219 RPM, he will be getting less than rated power to the cutter drum.

The SC-Maxum line shows that, like the SC-2 300, the maximum power delivered to the engine is 270 HP. This is a function of the engine’s limitations. "B" depicts the operating range of the cutter head RPM in which the engine will be producting it’s maximum power. The graph shows that maximum power will be applied to the cutter head all the way through 547 RPM. This means simply, that no matter what RPM the operator uses the cutter head in the optimal range, he will be applying the maximum power available to the work at hand. This same increased power will reaccelerate the cutter head when load is reduced.

 

  
             

 

 



 

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